Thanks Cliff. I did come across that same site and calculator during my quest. (also added it to my bookmarks)

I can see what you mean about the changing values and how they change the outcome, but I'm still trying to wrap my head around how those numbers translate to real world sound and what my ears will hear.

Right now I'm using a .0068uf cap in parallel with a 500k Ω resistor. I've settled on that for today. I'm braindead now...